双船浮托法中三船系统的水动力

Hydrodynamics of Three-Vessel System in Twin-Vessel Floatover

基于三维势流理论,对采用双船浮托法进行过驳作业时三船系统的水动力参数进行数值计算,分析三船系统的水动力特性和运输船与两侧浮托船间距之间的关系。计算结果表明:当三船间距逐渐增大时,水动力系数波峰(或波谷)的产生距离呈规律变化,一般为1/2倍或1倍波长;在部分频率上,当三船间距较小时会出现剧烈的共振。结合分析结果对双船浮托法的方案设计提出建议。

The hydrodynamic parameters of three-vessel system in twin-vessel floatover is studied based on the three dimensional potential flow theory,focusing on the effect of the gap between the transportation vessel and two floatover barges.The analysis results indicate that:the distance between the peaks(or troughs)of the hydrodynamic force coefficient changes regularly with the gap varying,the distance between the adjacent extreme is half wave length or one wave length;when the gap is really small,the hydrodynamic parameters resonate at specific frequency.The recommendation is proposed for the twin-vessel floatover design based on the analysis results.